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(11) | EP 2 472 743 B1 |
| (12) | EUROPEAN PATENT SPECIFICATION |
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METHOD AND DEVICE FOR SUPPLYING POWER TO 300PIN 40GB OPTICAL MODULE VERFAHREN UND VORRICHTUNG ZUR STROMVERSORGUNG EINES OPTISCHEN 300PIN-40GB-MODULS PROCÉDÉ ET DISPOSITIF D'ALIMENTATION D'UN MODULE OPTIQUE DE 300 BROCHES À 40 GB |
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| Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). |
Field of the Invention
[0001] The present invention relates to the electronic technical field, and in particular to a method and an apparatus for supplying power to a 300 PIN MSA 40Gb TRANSPONDER.
Background of the Invention
[0002] The 300 PIN MSA Multi Source Agreement 40Gb TRANSPONDER protocol described in the "REFERENCE DOCUMENT FOR 300 PIN 40Gb TRANSPONDER" requires that a single board is capable of providing an Adaptable Power Supply (APS) with a voltage range of 1.2V ~ 2.5V for a 300 PIN MSA 40Gb TRANSPONDER. The protocol gives the connection block diagram between the APS and the TRANSPONDER, as shown in Fig. 1A. According to the protocol, the pins between the APS and the 300 PIN TRANSPONDER include 4 signals which are APS Digital, APS SENSE, APS SET and GND respectively. The APS Digital is used to supply power to the TRANSPONDER, the APS SET sets the regulation point of APS output voltage and the APS SENSE signal provides remote sensing to the output voltage APS POWER. Correspondingly, there are four pins between the APS and the 300 PIN TRANSPONDER, which are APS Digital pin, APS SENSE pin, APS SET pin and GND pin respectively.
[0003] To make reckoning and understanding easy, Fig. 1A can be simplified, as shown in Fig. 1B. The calculation formula for VAPS_Digital can be obtained from Fig. 1B:
[0004] The protocol specifies the correlation between the output VAPS_Digital and resistor R1, as shown in Table 1.
| R1 resistance value (Ω) | Vout (V) |
| 1530 | 1.2 |
| 672 | 1.5 |
| 330 | 1.8 |
| 0 | 2.5 |
[0005] The Vout in Table 1 is VAPS_Digital. According to the correlation specified in Table 1 between the resistance value of R1 and VAPS_Digital, the 300 PIN 40Gb TRANSPONDER protocol gives a parameter selection solution which can meet the correlation: Vsense=0.8V, R2=470 Ω and R3=1000Ω. Based on this parameter selection solution, as shown in Fig. 1, only the power supply control chip with a reference voltage (namely, the Vfeedback in the Figure) of 0.8V can meet the requirements. This narrows the selection scope of the power supply control chip.
[0006] It is noted that the publication entitled "Product Manual/Catalogue or other information obtained from a Web-site" by anonymous, Reference document for 300 PIN 40GB Transponder [online] 300 PIN MSA, 19 July 2002 (2002-07-19), pages 10-13, discloses technical features of a 40 Gbit/s transponder multisource.
Summary of the Invention
[0007] The present invention provides a method and an apparatus for supplying power to a 300 PIN MSA 40Gb TRANSPONDER, so as to solve the problem that the selection scope of power supply control chip is too narrow when supplying power to a 300 PIN MSA 40Gb TRANSPONDER in the conventional art.
[0009] A method for supplying power to a 300 PIN MSA 40Gb TRANSPONDER, comprising:
a power supply control module supplying power to the 300 PIN MSA 40Gb TRANSPONDER through APS Digital pin of the 300 PIN MSA 40Gb TRANSPONDER;
a reference voltage terminal of the power supply control module connecting to the APS sense pin of the 300 PIN MSA 40Gb TRANSPONDER by a resistor R3, connecting to the APS Set pin of the TRANSPONDER by a resistor R2 and connecting to a bias voltage terminal of itself by a resistor R4.
[0010] An apparatus for supplying power to a 300 PIN MSA 40Gb TRANSPONDER, comprising a power supply control module, a resistor R2, a resistor R3 and a resistor R4, wherein
the power supply control module is configured to supply power to a 300 PIN MSA 40Gb TRANSPONDER through a APS Digital pin of the 300 PIN MSA 40Gb TRANSPONDER, and the power supply control module contains a reference voltage terminal used to receive external feedback voltage and a bias voltage terminal used to supply the internal base voltage of the module;
the resistor R2 is connected across the reference voltage terminal and a APS Set pin of the TRANSPONDER;
the resistor R3 is connected across a APS Sense pin of the TRANSPONDER and the reference voltage terminal;
the resistor R4 is connected across the reference voltage terminal and the bias voltage terminal.
[0011] According to the technical solution of the present invention, since the resistance element connected across the reference voltage terminal and internal bias voltage terminal of the power supply control chip has a shunting effect, the voltage of the output terminal of the power supply control chip can be regulated; the resistance value of the resistance element can be determined by calculation, thus rendering that the selection for power supply control chip is converted to the selection for resistance element, which expands the selection scope of power supply control chip and is helpful to reduce development cost. Moreover, since a high precision internal bias voltage terminal of power supply control chip is used, no more elements are required to build a shunting circuit, which can save the space of circuit board as well as ensure precision of supply voltage.
Brief Description of the Drawings
[0012]
Fig. 1A is the connection block diagram given by the 300 PIN MSA 40Gb TRANSPONDER protocol between the Adaptable Power Supply (APS) and the TRANSPONDER;
Fig. 1B is the simplified circuit diagram of Fig. 1;
Fig. 2 is the schematic diagram of the mode for supplying power to a 300 PIN MSA 40Gb TRANSPONDER in the present embodiment;
Fig. 3 is the schematic diagram when applying Kirchhoff's Current Law to the circuit which connects the APS and TRANSPONDER;
Fig. 4 is the simplified diagram of the circuit connecting the APS and TRANSPONDER;
Fig. 5 is the structural schematic diagram of the apparatus for supplying power to a 300 PIN MSA 40Gb TRANSPONDER in the present embodiment.
Detailed Description of the Embodiments
[0013] The technical solution in the embodiment of the present invention will be illustrated hereinafter in conjunction with the drawings. The drawings are used to help understanding the technical solution in the embodiments rather than to limit the invention in the forms shown by the drawings during the realization.
[0014] In the present embodiment, as shown in Fig. 2, the power supply control module 21 supplies power to the TRANSPONDER 22 through the APS Digital pin of the 300 PIN MSA 40Gb TRANSPONDER 22; the reference voltage terminal of the power supply control module 21 is connected to the APS Sense pin of the 300 PIN MSA 40Gb TRANSPONDER by a resistors R3, connected to the APS Set pin of the TRANSPONDER 22 by a resistors R2 and connected to the bias voltage terminal of itself by a resistor R4.
[0015] The power supply control module 21 may use a power supply control chip of which bias voltage terminal is generally used to supply base voltage Vbias to the chip. While in the embodiment, applying Kirchhoff's Current Law, the current shunting is performed by the internal bias voltage pin, thus resolving the limit to the output voltage Vsense=0.8V of the APS power supply control chip. During the circuit is connected, as shown in Fig. 3, apply Kirchhoff's Current Law to the circuit connecting the APS and TRANSPONDER, and connect the resistor R4 across the reference voltage terminal pin (indicated as Vsense in the figures) and internal bias voltage terminal pin (indicated as Vbias in the figures) of the power supply control chip. According to the circuit shown in Fig. 3, it can be concluded that:
and
[0016] In Fig. 3, I1 is the current flowing through R3, I2 is the current flowing through R4 and I3 is the current flowing through R1 & R2. The definition of Kirchhoff's Current Law is that the sum of the currents flowing to some node at any moment is equal to the sum of the currents flowing out of the node. So it can be known from the Kirchhoff's Current Law that I3=I1+I2. According to this formula and the following expression formulae of I1, I2 and I3, in the simplified diagram of the circuit connecting the APS and TRANSPONDER which is shown in Fig. 4, it can be concluded that:
[0017] In Formula (2), the APS output voltage is still the sum of the voltage drop of R3 and the voltage Vsense, while the current flowing through R3 is the difference of that flowing through R2 and R4. That is to say, R4 has a shunting effect. The output voltage range of the output terminal of the power supply control module 21 may be 1.2V~2.5V and the output current range thereof may be 0.4A~4.5A. Since R4 has a shunting effect, the voltage of the reference voltage terminal Vsense of the power supply control chip shall be more than 0.8V
[0018] The resistance value of the grounding resistor R1 of the APS Set pin of the TRANSPONDER is pre-set so as to enable the equivalent load LOAD of the TRANSPONDER to obtain the voltage required, wherein the voltage is the input voltage of the APS Digital pin. The resistance values of the resistors R2, R3 and R4 are determined by the resistor R1 and the specified input voltage of APS Digital pin. To meet the correlation regulated in Table 1 between R1 and Vout, each row of data in Table 1 may be substituted in Formula (2) to obtain 4 equations, wherein the Vout value is substituted in VAPS_Digital of Formula (2), the Vsense value uses the output voltage value of the selected power supply control chip, wherein the output voltage value shall be more than 0.8V, and Vbias value uses the internal bias voltage of the selected power supply control chip. Solve the simultaneous equations set formed by the 4 equations to obtain a set of R2, R3 and R4 values, and then build a circuit according to the obtained R2, R3 and R4 values, thus realizing that the Vout specified in Table 1 is obtained by using a power supply control chip with a reference voltage more than 0.8V.
[0019] Based on the above method, the apparatus in the present embodiment is detailed hereinafter. As shown in Fig. 5, the apparatus in the present embodiment mainly comprises a power supply control module 51, a resistor R2, a resistor R3 and a resistor R4. The power supply control module 51 contains a reference voltage terminal Vfeedback used to receive external feedback voltage and a bias voltage terminal Vbias used to provide the internal base voltage of the module. The power supply control module 51 is configured to supply power to the APS Digital pin of the 300 PIN MSA 40Gb TRANSPONDER by the output port OUT.
[0020] As shown in the figures, the resistor R2 is connected across the reference voltage terminal Vfeedback of the power supply control module 51 and the APS Set pin of the TRANSPONDER, the resistor R3 is connected across the APS Sense pin of the TRANSPONDER and the reference voltage terminal Vfeedback, and the resistor R4 is connected across the reference voltage terminal Vfeedback and the bias voltage terminal Vbias.
[0021] The power supply control module may use a power supply control chip with a reference voltage more than 0.8V, wherein the output voltage range of the power supply control chip contains 1.2V~2.5V and the output current range thereof contains 0.4A~4.5A.
[0022] According to the technical solution of the present embodiment, since the resistance element connected across the reference voltage terminal and internal bias voltage terminal of the power supply control chip has a shunting effect, the voltage of the output terminal of the power supply control chip can be regulated; the resistance value of the resistance element can be determined by calculation, thus rendering that the selection for power supply control chip is converted to the selection for resistance element, which expands the selection scope of power supply control chip and is helpful to reduce development cost. Moreover, in the embodiment, since a high precision internal bias voltage terminal of power supply control chip is used, no more elements are required to build a shunting circuit, which can save the space of circuit board as well as ensuring precision of supply voltage.
[0023] Obviously, those skilled in this art may make various changes and alterations of the present invention without deviation from the spirit and scope of the present invention. Thus, if any such change or alteration is within the scope of the claims and equivalent technology of the present invention, the present invention is also intended to contain these changes and alterations.
a power supply control module (21, 51) supplying power to the 300 PIN MSA 40Gb TRANSPONDER through a APS Digital pin of the 300 PIN MSA 40Gb TRANSPONDER;
a reference voltage terminal of the power supply control module connecting to a APS Sense pin of the 300 PIN MSA 40Gb TRANSPONDER by a first resistor (R3), connecting to a APS Set pin of the 300 PIN MSA 40Gb TRANSPONDER by a second resistor (R2) and connecting to a bias voltage terminal of itself by a third resistor (R4).
substituting several groups of corresponding R1 and Vout values in the formula Vout=R3×Vsense/(R2+R1)-(Vbias-Vsense)×R3/R4+Vsense to obtain several equations;
solving the simultaneous equations set established by the several equations to obtain the resistance values of the second resistors (R2), the fist resistor (R3) and the third resistor (R4);
wherein Vout indicates the specified input voltage of the APS Digital pin, Vsense indicates the voltage value of the reference voltage terminal of the power supply control module, R1 indicates the preset grounding resistance of the APS Set pin, and R2, R3 and R4 indicate the resistance values of the second resistor (R2), the first resistor (R3) and the third resistor (R4) respectively.
the power supply control module is configured to supply power to the 300 PIN MSA 40Gb TRANSPONDER through a APS Digital pin of the 300 PIN MSA 40Gb TRANSPONDER, and the power supply control module contains a reference voltage terminal used to receive external feedback voltage;
the second resistor (R2) is connected across the reference voltage terminal and a APS Set pin of the TRANSPONDER;
the first resistor (R3) is connected across a APS Sense pin of the TRANSPONDER and the reference voltage terminal;
characterized in that the power supply control module contains a bias voltage terminal used to supply an internal base voltage of the module; and
that the third resistor (R4) is connected across the reference voltage terminal and the bias voltage terminal.
ein Stromversorgungssteuermodul (21, 51), welches den 300PIN-MSA-40Gb-TRANSPONDER durch einen APS-Digitalpin des 300PIN-MSA-40Gb-TRANSPONDERS mit Strom versorgt;
eine Referenzspannungsklemme des Steuermoduls der Stromversorgung, anschließend an einen APS-Sense-Pin des 300PIN-MSA-40Gb-TRANSPONDERS durch einen ersten Widerstand (R3), anschließend an einen ΔPS-Set-Pin des 300PIN-MSA-40Gb-TRANSPONDERS durch einen zweiten Widerstand (R2) und anschließend an eine Vorspannungsklemme von sich selbst durch einen dritten Widerstand (R4).
Ersetzen mehrerer Gruppen entsprechender R1- und Vout-Werte in der Formel Vout=R3xVsense/(R2+R1)-Vbias-Vsense)xR3/R4+Vsense, um mehrere Gleichungen zu erhalten;
Lösen des gleichzeitigen Gleichungssatzes, erstellt durch die mehreren Gleichungen, um die Widerstandswerte des zweiten Widerstands (R2), des ersten Widerstands (R3) und des dritten Widerstands (R4) zu erhalten;
wobei Vout die angegebene Eingangsspannung des APS-Digitalpins angibt, Vsense den Spannungswert der Referenzspannungsklemme des Steuermoduls der Stromversorgung angibt, R1 den voreingestellten Erdungswiderstand des APS-Set-Pins angibt und R2, R3 und R4 die Widerstandswerte des zweiten Widerstands (R2), des ersten Widerstands (R3) bzw. des dritten Widerstands (R4) angeben.
das Steuermodul der Stromversorgung konfiguriert ist, um den 300PIN-MSA-40Gb-TRANSPONDER durch einen APS-Digitalpin des 300PIN-MSA-40Gb-TRANSPONDERS mit Strom zu versorgen und das Steuermodul der Stromversorgung eine Referenzspannungsklemme enthält, die zum Empfangen von externer Rückkopplungsspannung verwendet wird;
der zweite Widerstand (R2) über die Referenzspannungsklemme und einen APS-Set-Pin des TRANSPONDERS angeschlossen ist;
der erste Widerstand (R3) über einen APS-Sense-Pin des TRANSPONDERS und die Referenzspannungsklemme angeschlossen ist;
dadurch gekennzeichnet, dass das Steuermodul der Stromversorgung eine Vorspannungsklemme umfasst, die verwendet wird, um eine interne Basisspannung des Moduls zu liefern; und
dass der dritte Widerstand (R4) über die Referenzspannungsklemme und die Vorspannungsklemme angeschlossen ist.
un module de commande d'alimentation (21, 51) alimentant le TRANSPONDEUR de 300 BROCHES MSA de 40 Gb par l'intermédiaire d'une broche Numérique APS du TRANSPONDEUR de 300 BROCHES MSA de 40 Gb ;
une borne de tension de référence du module de commande d'alimentation se connectant à une broche de Détection APS du TRANSPONDEUR de 300 BROCHES MSA de 40 Gb par une première résistance (R3), se connectant à une broche de Réglage APS du TRANSPONDEUR de 300 BROCHES MSA de 40 Gb par une deuxième résistance (R2) et se connectant à une borne de tension de polarisation de lui-même par une troisième résistance (R4).
la substitution de plusieurs groupes de valeurs R1 et Vout correspondantes dans la formule Vout=R3xVsense/ (R2+R1) - (Vbias-Vsense) xR3/R4+Vsense pour obtenir plusieurs équations ;
la résolution de l'ensemble d'équations simultanées établi par les multiples équations pour obtenir les valeurs de résistance des deuxièmes résistances (R2), de la première résistance (R3) et la troisième résistance (R4) ;
dans laquelle Vout indique la tension d'entrée spécifiée de la broche Numérique APS, Vsense indique la valeur de tension de la borne de tension de référence du module de commande d'alimentation, R1 indique la résistance de mise à la terre préréglée de la broche de Réglage APS, et R2, R3 et R4 indiquent les valeurs de résistance de la deuxième résistance (R2), de la première résistance (R3) et la troisième résistance (R4) respectivement.
le module de commande d'alimentation est configuré pour alimenter le TRANSPONDEUR de 300 BROCHES MSA de 40 Gb par l'intermédiaire d'une broche Numérique APS du TRANSPONDEUR de 300 BROCHES MSA de 40 Gb, et le module de commande d'alimentation contient une borne de tension de référence utilisée pour recevoir une tension de rétroaction externe ;
la deuxième résistance (R2) est connectée sur la borne de tension de référence et une broche de Réglage APS du TRANSPONDEUR ;
la première résistance (R3) est connectée sur une borne de Détection APS du TRANSPONDEUR et la borne de tension de référence ;
caractérisé en ce que le module de commande d'alimentation contient une borne de tension de polarisation utilisée pour acheminer une tension de base interne du module ; et
que la troisième résistance (R4) est connectée sur la borne de tension de référence et la borne de tension de polarisation.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Non-patent literature cited in the description
- Product Manual/Catalogue or other information obtained from a Web-siteReference document for 300 PIN 40GB Transponder [online] 300 PIN MSA, 2002, 10-13 [0006]